Now now, this could be a whole can of worms. Whenever I go to find any information about any plant there's always the Hardiness Zone described next to it. My location Islamabad falls somewhere around 9a and/or 9b. That is all well and good because it tells you how much cold the plant will tolerate.
Now where it gets muddy is how much HEAT the plant will tolerate. Because you know it so often happens that you buy a plant in spring, it does look beautiful and seems to be thriving but come summer and you have to do a thousand things just to keep it barely alive (forget about blooms and stuff).